from multiprocessing import Process

num = 1

def work1():
    global num
    num += 5
    print('子进程1运行，num',num)

def work2():
    global num
    num += 10
    print('子进程2运行，num',num)

if __name__ == "__main__":
    print('父进程开始运行')
    p1 = Process(target=work1)
    p2 = Process(target=work2)
    p1.start()
    p2.start()
    p1.join()
    p2.join()
    print('主进程的num:',num)